eZ\Publish\Core\Persistence\Cache\CacheServiceDecorator::washKey PHP Method

Remove slashes from start and end of keys, and for content replace it with _ to avoid issues for Stash.

private washKey ( string $key ) : string
$key	string
return	string

    private function washKey($key)
    {
        return str_replace('/', '_', trim($key, '/'));
    }

CacheServiceDecorator